Grabbing the railing on the subway? For some of us, it’s a fact of life, but I’m told there are plenty of people out there who liken it to shoving your hand in a toilet. According to a recent TripAdvisor poll of more than 4,000 travelers, around one-third consider themselves to be “germaphobic” since the H1N1 swine flu outbreak.

So, where do germaphobes go? I imagine they hang out in hospitals and Reston, Virginia (you can do surgery off the streets there). More interesting is where these clean freaks won’t go: TripAdvisor’s five “germiest” world attractions.

Pucker up for the Blarney Stone: kiss the Blarney Stone, according to legend, and you’ll be rewarded with the gift of eloquent speech … yours and 400,000 other mouths.

Kiss the dead guy’s memorial: people just can’t keep their lips to themselves … if it’s not the Blarney Stone, then it’s Oscar Wilde‘s tomb in Paris.

Chew on the Wall of Gum: at Seattle‘s Market Theatre in Post Alley: there’s a giant wall of gum. And, travelers have begun to add to it. Try to stick yours on it without feeling anyone else’s contribution (blech).

Run with the pigeons in Venice: vendors in St. Mark’s Square have stopped selling food to tourists who feed the birds, because of the situation – I think Alfred Hitchcock made a movie about it.

Tactile Chinese theater in Hollywood: millions of people grind their fingers into the handprints at the Forecourt of Grauman’s Chinese Theater in the film capital of the world.